Mdp filename don't work

[fadri14]

Hello, I would like to display the name of the file currently playing with mdp when my cursor remains on the module. The problem that if I put {filename} in "tooltip-format" is "tooltip-format-disconnected" that appears even if the music is working.
Here is the configuration of the module:

"mpd": {
            "format": "{stateIcon} {consumeIcon}{randomIcon}{repeatIcon}{singleIcon} {elapsedTime:%M:%S}/{totalTime:%M:%S} ⸨{songPosition}|{queueLength}⸩ {volume}% ",
            // "format": "{stateIcon} {consumeIcon}{randomIcon}{repeatIcon}{singleIcon}{artist} - {album} - {title} ({elapsedTime:%M:%S}/{totalTime:%M:%S}) ⸨{songPosition}|{queueLength}⸩ {volume}% ",
            "format-disconnected": "Disconnected ",
            "format-stopped": "{consumeIcon}{randomIcon}{repeatIcon}{singleIcon} Stopped ",
            "unknown-tag": "N/A",
            "interval": 2,
            "consume-icons": {
                "on": " "
            },
            "random-icons": {
                //"off": "<span color=\"#f53c3c\"></span> ",
                "on": " "
            },
            "repeat-icons": {
                "on": " "
            },
            "single-icons": {
                "on": "1 "
            },
            "state-icons": {
                "paused": "",
                "playing": ""
            },
            //"tooltip-format": "Sound: {artist} - {album} - {title}",
            "tooltip-format": "{filename}",
            //"tooltip-format": "MPD (connected)",
            "tooltip-format-disconnected": "MPD (disconnected)",
            "on-click": "mpc toggle",
            "on-double-click": "mpc next",
            "on-click-right": "mpc seek 00:00:00",
            "on-double-click-right": "mpc prev"
        },

Thanks to those who will take the time to help me